Hello,
I have bought an Arduino Nano Every. However, when I connect it to my Mac mini, Arduino IDE shows me no ports. So the Arduino is not connected. The USB cable is definitely plugged in. What can I do to make the Mac find the right port?
does your mac have the necessary drivers? Also, some devices may not be compatible with the Every.
The IDE will only see the Nano Every if the operating system sees it. So start there.
I think the Nano Every has a micro-USB connector. Micro-USB cables are notorious for coming in two flavours; make sure that you are using a data/sync cable and not a charge-only cable.
which driver I need for the Mac mini and the Nano every?
never mind, I use a PC that I need to install driver after driver 
to get things to work. According to https://wiki-content.arduino.cc/en/Guide/NANOEvery
Yes, make sure to use a non-damaged data cable. And yes, I am the best thank you @sterretje 
Hope this helps anyone trying to troubleshoot Arduino USB connections on a Mac - I also use the IDE on a Mac - currently Monterey on a 2015 MBP.
To see if the OS sees the Arduino board (said another way, to list all USB devices the OS sees) - from Terminal run:
ioreg -p IOUSB
You will see a list of all USB devices, e.g. the USB controller, the keyboard, the bluetooth controller, etc.
When I plug in my Nano Every, from the command I see:
+-o Arduino Nano Every@14100000 <class AppleUSBDevice, id 0x100000711, registered, matched, active, busy 0 (1 ms), retain 13>
When I plug in my Uno R3, from the command I see:
+-o IOUSBHostDevice@14100000 <class AppleUSBDevice, id 0x1000006e5, registered, matched, active, busy 0 (1 ms), retain 13>
So, with no Arduino plugged in, you run that command and get a list of the devices, then plug in the Arduino, run the command again, if no new USB device listed then MacOS isn't seeing the Arduino, therefore the IDE won't see it either (as another person has already said above).
Also as someone said above, the Mac not seeing the Arduino is most likely a USB cable data transfer issue - assuming the Arduino powers up off the USB cable.
And FWIW every Mac I have used, with quite a few versions of MacOS, assuming a good cable, I could just plug the Arduino in and the Mac (and the IDE) would see it, no further steps needed to be taken...I've never had to install a driver...hope that helps...
Something changed recently, mu Silicone Mac needs a driver but I am having trouble installing it. Nono works, but esp32 does not. I think the most recent Mac upgrade broke something.